A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, as shown in given figure. If the height of the cylinder is 20 cm, and its base is of radius 3.5 cm, find the total surface area of the article.
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Let the original height of cylinder = 10cm
base radius of cylinder = 3.5cm
so base radius of hemisphere = 3.5cm(same as that of cylinder)
The total surface area would be the sum of curved surface area of cylinder and the surface areas of 2 hemispheres.
surface area of cylinder = 2πrh
surface area of one hemisphere = 2πr²
tsa=2πrh+4πr²
=2πr (h+r)
=2*22÷7*3.5(10+2)
=22(12)
base radius of cylinder = 3.5cm
so base radius of hemisphere = 3.5cm(same as that of cylinder)
The total surface area would be the sum of curved surface area of cylinder and the surface areas of 2 hemispheres.
surface area of cylinder = 2πrh
surface area of one hemisphere = 2πr²
tsa=2πrh+4πr²
=2πr (h+r)
=2*22÷7*3.5(10+2)
=22(12)
akshitanand001ouuwax:
its wrong guys
height is 20 m
Anyone give me and tomorrow is exam
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height is 20 y did u take 10 cm plz
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